Xkeymacs

"Xkeymacs is a (GPL2'ed) free software which gives emacs-style key
bindings to all applications under Windows. (Each key bindings can be
turned on or off for respective applications using GUI.)
You can, for example, save a file with C-x C-s.
And, of course, you can use C-{a,e,n,p,f,b}, C-{w,y} and so forth.
Moreover, C-k, C-l, C-t, C-0 .. C-9, etc. also work (as you expect)." Details at Linux Weekly News.